<nav class="panel is-link">
    <p class="panel-heading">
        书籍(Book)
    </p>
    <#list books as b>
        <a class="panel-block <#if b.bookKey == book.bookKey>is-active</#if>" href="/books/${b.bookKey}/chapter">

        <span class="panel-icon">
            <i class="fas fa-book" aria-hidden="true"></i>
        </span>
            ${b.bookName}
        </a>
    </#list>
    <div class="panel-block">
        <button class="button is-link is-outlined is-fullwidth" onclick="window.location.href = '/books'">
            更多书籍
        </button>
    </div>
</nav>